Organic light-emitting material, device and method
AssigneesCambridge Display Technology Limited, Sumitomo Chemical Company, Limited
InventorsJonathan Pillow, Torsten Bünnagel, Martina Pintani, Christian Nielsen
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Abstract
Composition having an organic semiconducting material and a triplet-accepting material of formula (I) with a triplet energy level lower than the triplet energy level of the organic semiconducting material, in which each Ar is optionally substituted aryl or heteroaryl group, n is 1-3, m is 1-5, q is 0 or 1, each R3 is H or a substituent, and each R4 is H or a substituent. Where R4 is not H, R4 and (Ar)m bound to the same carbon atom may be linked by a direct bond or a divalent group. Where n or m is at least 2, adjacent Ar groups may be linked by a divalent group. Where q=0, R3 is not H and is linked to (Ar)n by a direct bond or a divalent group.
Claims18
A fluorescent light-emitting polymer comprising a fluorescent light-emitting repeat unit and a triplet-accepting repeat unit having a triplet energy level lower than the triplet energy level of the light-emitting repeat unit, wherein the triplet-accepting repeat unit has the formula:
- wherein each Ar independently represents an optionally substituted aryl or heteroaryl group;
- at least one Ar group is phenyl;
- n is 1;
- m is 1-5;
- q is 0;
- R3 is phenyl;
- R4 is selected from H or a substituent;
- in the case where R4 is not H, R4 and (Ar)m bound to the same carbon atom are optionally linked by a direct bond or a divalent group and (Ar)m are optionally linked by a direct bond or a divalent group;
- adjacent Ar groups are optionally linked by a divalent group in the case where m is at least 2;
- and R3 is linked to (Ar)n by a direct bond.
Dependencies are inferred from the claim text.